Estimation of general corrosion damage to steel reinforced mortar using frequency sweeps of guided mechanical waves
A frequency sweep from 50 to 200 kHz of guided mechanical waves has been conducted to detect and assess general corrosion damage in steel reinforced mortar specimens with seeded defects and in specimens undergoing accelerated corrosion using impressed current. The sweep was conducted
by primarily invoking the fundamental longitudinal mode of propagation, ie the L(0,1) mode. The change in waveform energy (indicative of attenuation) at different frequencies is presented and discussed in terms of general corrosion damage. The isolated effects of rebar surrounded by water
and mortar are also discussed. Experimental results indicate that general corrosion damage can be detected and evaluated by invoking the fundamental longitudinal mode of propagation. Results are presented and discussed within the framework of a corrosion process degradation model and service
life. A review and discussion of the corrosion process and service life analysis of reinforced concrete is also presented.
Document Type: Research Article
Publication date: 01 November 2006
- Official Journal of The British Institute of Non-Destructive Testing - includes original research and development papers, technical and scientific reviews and case studies in the fields of NDT and CM.
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